JEE Main20245 Apr 2024Evening ShiftChemistryElectrochemistryActual
For the electro chemical cell ( gathered If E _ ( M ²⁺ / M ) ^0=0.46 ~V and E _ ( x / X ²⁻ ) ^0=0.34 ~V . gathered ) Which of the following is correct?
Options
- A( M + X M ²⁺+ X ²⁻ ) is a spontaneous reaction
- B( E _ cell =0.80 ~V )
- C( E _ cell =-0.80 ~V )
- D( M ²⁺+ X ²⁻ M + X ) is a spontaneous reaction
Correct answer
D. ( M ²⁺+ X ²⁻ M + X ) is a spontaneous reaction
Step-by-step solution
aligned & M M ⁺² | X / X ²⁻ & E _ cell ^ o = E _ M / M ⁺² ^ o + E _ X / X ⁻² ^ o & =-0.46+0.34=-0.12 ~V aligned As E _ cell ^ o is negative so anode becomes cathode and cathode become anode. Spontaneous reaction will be M ⁺²+ X ²⁻ M + X